from urllib.parse import unquote

url = '201016_161714-%E4%B8%8B4+53%E8%A1%A5%E5%85%85%E5%86%85%E5%AE%B9%E2%80%94%E2%80%94%E5%8A%A8%E8%AF%8D16%E7%A7%8D%E6%97%B6%E6%80%81%E7%9A%84%E5%90%A6%E5%AE%9A%E5%8F%A5%E5%92%8C%E7%96%91%E9%97%AE%E5%8F%A5--%E8%AE%B2%E4%B9%89.pdf'

print(unquote(url))